According to the sources provided, Lipitor (atorvastatin) is a medication used to lower cholesterol levels in the blood [1]. While there is no clear evidence that suggests Lipitor affects sleep quality, some individuals may experience insomnia as a side effect of taking this medication [2][3].

The British Heart Foundation states that insomnia is a rare side effect of statins, including Lipitor, and it usually goes away on its own after a few days or weeks [2]. However, if the insomnia persists or becomes bothersome, individuals should speak with their healthcare provider about adjusting the dosage or trying a different medication [2].

AARP also lists Lipitor as a medication that can cause insomnia in some individuals, but again, this is not a common side effect [3]. Other potential side effects of Lipitor include muscle pain, weakness, and liver problems [1].

In summary, while Lipitor is not known to directly affect sleep quality, some individuals may experience insomnia as a side effect of taking this medication. If this occurs, it is recommended to speak with a healthcare provider about potential solutions.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.bhf.org.uk/informationsupport/heart-matters-magazine/medical/ask-the-experts/statins-and-sleep
[3] https://www.aarp.org/health/drugs-supplements/info-04-2013/medications-that-can-cause-insomnia.html